What is the slope of the line through (3, 3) and (0, 12)? Pls help due soon

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

Which expression is rational? 6. , square root two, square root 14, square root 49